Automatic drill



(N0 ModelQ) 2 sheets-sheet 1..

J. HUGHES.

AUTOMATIC DRILL.

l 7 IE By TORNBYS,

N. PETERS, PholoLltmgnphlr. Washingiun. D. C,

(No Model.)

J. HUGHES.

AUTOMATIC DRILL.

2 Sheets-Sheet 2;

, Patented A PLHHr RN mu N. PETERS. PtMoLilhcgnpMn Wishingim. D. C,

2 is a side view of the same.

UNITED STATES PATENT GFFICE.

JAMES HUGHES, OF AUBURN,

TAUTOIMATIC DRILL.

sPncIr'IcA'r-IoN forming part of Letters Patent No. 315,411, dated April '1, 1885,.

Application filed June 28, 1884. (No model.)

To all whom it may concern Be it known that I, JAMES HUGHES, a citizen of the United States, and a resident of Auburn, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Automatic Drills; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accd'fnpanying drawings, which form a part of this specification, andin which- .Figurel is a perspective'view of my improved automatic or self-reversing drill. Fig. Fig. 3 is a front View. Fig. 4 is avertical sectionalview taken on the line mo in Fig. 3. Fig. 5 is a top view,

. in its action, or self-reversing, and in which provision shall be made for regulating the point at which the reversing motion shall take place.

The invention consists in the improved construction and arrangement of parts, to be hereinafter described, and particularly pointed out in the claims.

In the drawings, A designates a suitable upright mounted upon a base, B, and provided upon its front side with a rack-bar or series of teeth, 0, engaging apinion, D,.which is secured upon atransverse shaft, E, mounted in suitable ears or bearings formed upon a vertically-sliding carriage, F, carrying the table or platform G, which is provided with a perforation, H, to receive the drill-point when the machine is operated. One end of the shaft E carries a ratchet-wheel, I, engaging a spring-pawl, J, which is pivoted to the side of the carriage, which is by this mechanism retained securely in any position to which it may be adjusted. The opposite end of the shaft E is provided with a hand-wheel, K, by

means of which it may be conveniently manipulated. l

The upper end of the upright A is provided 'witha pair of horizontal arms, L L, which form the top or head of'the machine. An additional arm, M, extends in an upward direction, as shown. Suitable bearings are provided in the said arm M and in a plate, N, at the rear ends of the arms L for a shaft,

0, having at its rear end a cone-pulley, P, adapted to receive motion from any suitable motive power. r

The front end of the shaft 0 is provided with a bevel-wheel, Q, engaging a pinion, R,

which is seated or mounted in a suitable bearing between the front cnds of the arms L. The said pinion has a central opening in which slides the shank Sof, the drill T, which the lower' end of the said shank. The shank S is to be connected with the pinion by means of a key, U, which, while it permits the shank to slide vertically, will cause it to re-..

.may be connected in any suitable manner to r volve with the pinion when the machine is,

horizonal shaft, A. The latter'is provided; with a pinion, B, meshing with a spur-wheel,

O, mounted loosely upon a shaft, B. The hub of the said spur-wheel is provided at its front end with an annular groove, D, over which is fitted the end of a forked spring, E, which is bolted to the frame of the machine. The

rear end of'the hub forms a clutch, F, adapted toengage a clutchcollar,G,which is shaft,with which it is connected by means of atransverse pin,'G,"working in a slot, H,

in the said clutch-collar. 'The latter ispro: vided with a central annular groove, 1, adapted to receive the forked endof a lever, J, which is pivoted to the side of the frame of the machine. The rear end of the cl utch-coh 9 arranged to slide longitudinally upon the r a part of the frame R in which the drillshank is mounted. It will be seen that when this pinion is revolved in either direction the said frame, with the drill, will be raised or lowered,as the case may be, while at the same time a rotary motion may be imparted to the drill by means of the bevel-wheel mounted upon its shank and the bevel-wheel upon the end of the main shaft engaging therewith.

The front end of the shaft D is provided with a hand-wheel, S, by means of which it may be conveniently manipulated for the purpose of adjusting the drill when power is not applied to the machine.

The main frame of the machine is provided at its front end with brackets T, forming bearings for a vertically-sliding rod,U,which is provided with stops or collars WV, adjustable upon the said rod by means of set-screws V. The lower end of the said rod is bent laterally, so as to form' an arm, X, terminating in a handle, Y. The said handle is pivotally connected with a lever, Z, mounted upon a stud, A, upon the side of the frame, and retained by the action of a spring, B, the tension of which may be regulated by means of anut, G". The rear end of the said lever is provided with an upwardly-extending arm, D, the upper end of which is connected by a rod, E, with the main handle. The said arm is also connected by means of a link or joint, F, with the free end of the lever J, which may thus be operated.

The frame which carries the drill-shank is provided with a forwardly-extendingarm,H, having a perforation, 1, which accommodates the vertically-sliding rod U, and adapted to engage the collars or stops upon the latter.

The operation of this invention is as follows: \Vhen the drill is to be operated, the clutch-collar G is placed in contact with the clutch upon spur-wheel C, and the shaft 0 is now revolved, imparting motion, through pinion X to cog-wheel W, the shaft V. of which will communicate motion through its cone-pulley and belt Y,to the shaft A through its (shaft As) cone-pulley Z, and the pinion B upon this shaft will engage spur-wheel O, which, by being engaged with collar G, Will revolve shaft D and the worm upon the same. The worm will revolve spur-wheel N and shaft 0, and pinion P upon this shaft will lower the rack-bar Q and the drill, feeding the latter to the work, and it will be seen that the pinions communicating revolution from one shaft to another will mesh with cog-wheels Z, and arm D will push the main handle or lever J back, disengaging clutch G from the spur-wheel G, and causing its rear end to engage clutch K upon pinion L, which is at all times engaged and revolved by spur-wheel W, and the shaft D and its worm will now be revolved in the opposite direction by being meshed directly with spur-wheel W, revolving within spur-wheel O, causing the worm to revolve the pinion N and I? in the direction opposite to its former revolution, raising the rack-bar and drill-frame at a comparatively greater speed, the spur-wheel W of a larger diameter engaging pinion L of a smaller diameter. When, now, the drill-frame and its arm H arrive at the upper stop W, it will push rod U upward, bringing clutch G in engagement with the clutch upon spur-wheel O, as before, through arms X Z D and main hagdle J, repeating the first-described operation.

Having thus described myinvention, I claim and desire to secure by Letters Patent of the United States- 1. In a drilling-machine, the combination, with a suitable frame, of a vertically-movable drill-carrying frame having a forwardlyextending arm, a guide-rod travelinginaperforation in the said arm, and provided with adjustable sleeves or stops, and having at its lower end alateral extension, mechanism connecting the latter with a reversing-lever, a clutch arranged to be operated by the saidlever, and sliding upon and revolving with a horizontal shaft having at its front enda worm arranged to operate the drill-carrying frame, and a pair of spur-wheels adapted to engage the said double clutch and to receive motion from the main shaft of the machine, substantially asset forth.

2. In a drilling-machine, the combination of a vertically-traveling drill-carrying frame having a vertical rack-bar, a shaft having a pinion at each end, one of the said pinions engaging the said rack-bar, a horizontal shaft aving a worm at one end engaging the other of the said pinions, and having means, as described, for having its mot-ion reversed at each end of the line of travel of the drill-carrying frame, and a hand-wheel at the end of the horizontal shaft for adjusting the drill independently of the reversing mechanism, as and for the purpose shown and set forth.

3. In an automatic reversing mechanism for a drilling-machine, the combination of the shaft D, operating the drill-feeding mechanism, the pinion O, having half-clutch F, revolving upon shaft D, and meshing with a pinion receiving motion from the drive-shaft, the sliding collar G, turning with the shaft In testimony that I claim the foregoing as my own I have hereunto aflixed my signature in presence of two witnesses.

JAMES HUGHES. l l

D, having half-clutches at both ends, and means, substantially as set forth, for sliding it upon shaft D, spring E, bearing against pinion G, and pinion L, havinghalf-clutoh K, 5 and meshing with a cog-wheel receiving mo- Witnesses:

tion from the drive-shaft, as and for the pur- PATRICK MGLAUGHLIN, pose shown and set forth. LAWRENCE 0. WHITE. 

